T-Online email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), T-Online is the mailbox provider for 15 domains — 0.00% of 666,213 domains with MX records. Its strongest TLD is .de (73.3% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-11 DNS snapshot.
What T-Online represents in this dataset
Telekom Germany consumer ISP mail.
Directory category: Mailbox. The classification comes from primary MX record (lowest preference). It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-11 snapshot shows about T-Online
Across 5 distinct TLDs its top three are .de (73.3%), .eu (6.7%), .com (6.7%) — together 86.7% of the 15 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. Directly comparable by the same detection rule: Self-Hosted, Google Workspace, Microsoft 365. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-11); a domain appears here when its published records match the primary MX record (lowest preference) rule, which is an infrastructure fact, not a commercial relationship.
TLD distribution (top 5 of 5)
Frequently asked questions
How many domains use T-Online?
15 domains in the Tranco top-1M use T-Online as their mailbox provider as of September 11, 2026, according to Live Direct Marketing's daily DNS scan.
What is T-Online's market share?
T-Online holds 0.00% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-11). The number is recomputed every day.
What are the biggest alternatives to T-Online?
The largest mailbox providers in the same category by Tranco top-1M share are: Self-Hosted, Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*) (as of 2026-09-11).
Largest mailbox providers in this category
Self-Hosted (22.45%) · Google Workspace (21.65%) · Microsoft 365 (16.96%) · Unknown / Other (6.58%) · Generic / unmatched (mx*.*) (2.53%) · Generic / unmatched (mail.*) (1.94%) · Proofpoint (1.88%) · Cloudflare Email Routing (1.74%) · Yandex 360 (1.61%) · Mimecast (1.46%)
Domain sample (top 15 by Tranco rank)
Showing 15 of 15 domains.